Description
The Hammas Calendar plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'apix' parameter in the 'hp-calendar-manage-redirect' shortcode in all versions up to, and including, 1.5.11 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Problem types
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Product status
* (semver)
Timeline
| 2026-03-02: | Vendor Notified |
| 2026-03-06: | Disclosed |
Credits
Djaidja Moundjid
References
www.wordfence.com/...-988a-4cb6-bf20-51878a5b1555?source=cve
plugins.trac.wordpress.org/...ar/tags/1.5.11/hp-calendar.php
plugins.trac.wordpress.org/...r/tags/1.5.11/src/HpPlugin.php
plugins.trac.wordpress.org/...calendar&sfp_email=&sfph_mail=